Issam AL Khoury¹, Fadi Abbas^2* and Imad Al-Deen AlJbeily ¹

1 Department of lands, Faculty of Agricultural Engineering, Homs University, Syria.
2 General Commission for Scientific Agricultural Research, Homs Research Center, Syria.
(*Corresponding author: Fadi Abbas, Email: fadiab77@gmail.com).

Received: 3/ 12/ 2025      Accepted: 9/ 2/ 2026

Abstract

This research was conducted Al-Duwayr region  north of Homs city, during the summer season of 2024, to study the effect of using different rates of vermicompost (2, 4, and 6 tons/ha), different rates of nitrogen fertilizer (75%, 50%, and 25% of the recommended nitrogen fertilizer amount), and spraying with 10% vermicompost tea, and their interactions, compared to the recommended 100% mineral fertilizer application, on some fertility characteristics of the soil planted by corn (Ghouta-82). The experiment designed according to a completely randomized block design and split plot arrangement with three replications. The results showed an increase in organic matter values, electrical conductivity, and available forms of nitrogen, phosphorus, and potassium in the soil with increasing vermicompost fertilization levels from 2 to 6 tons/ha. These levels had no effect on soil pH, while the interaction treatment (75% nitrogen and 6 tons/ha of vermicompost) achieved the highest soil organic matter content (2.41%), and the highest mineral nitrogen content (48.36 ppm), available phosphorus (16.65 ppm), and available potassium (240.5 ppm). Furthermore, the 50% nitrogen fertilization treatments with 2, 4, and 6 tons/ha of vermicompost increased the content of available forms of nitrogen, phosphorus, and potassium in the soil compared to the mineral control treatment. Therefore, the research concluded that it is possible to reduce the amount of nitrogen mineral fertilizers by 50% when adding 2-6 tons/ha of vermicompost, thereby enhancing soil fertility

Keywords: Vermicompost, nitrogen, soil fertility, maize.

 Full paper in Arabic: PDF